I agree the sign up process and maybe the first two weeks or so before you start to grasp the basics in Steem are a big hurdle that will need to be streamlined to get to a higher adoption.
There are solutions to both hurdles I think. The point is when they will become the first priority and to keep the entire process as less centralized as possible (which is a big issue!).
I would agree that solutions to overcome the initial problems can be found. The upcoming Hardfork is, supposedly, going to address at least part of it by making account generation quicker. There are other aspects to consider as well, though.
Steemit is poised on the cusp of growth that will benefit everyone here providing it is managed correctly. I, for one, hope to see it overcome limitations and find it's true potential.
Thanks for posting @gadrian!